Knowing the Numbers (Class 6- Practice Problems)

1.    Insert commas suitably and write the names according to International System of Numeration :
    (a)    523427310              (b)    0013003002
    (c)    403010009              (d)    750043109
2.    Write the number names of the following numbers in Indian system.
    (a)    364953        (b)    8495472
    (c)    267300375                (d)    453764894
3.     Fill in the blanks:
    (a)    2 arab = _______ billion.
    (b)    4 million = _______ lakh.
    (c)    3 crore  = _______ hundred thousand.
    (d)    29 billion = _______ lakhs.
4.    Give a rough estimate (by rounding off to nearest thousands) and also a closer estimate (by rounding off to nearest hundreds) :
    (a)    636 + 6,432    (b)    34,569 – 5,991  
    (c)    4,331 – 679    (d)    7,84,356 – 7,00,879
5.    Find using distributive property :
    (a)    827 × 101       (b)    8793 × 1001 
    (c)    379 × 55        (d)    178 × 95